Lightweight cylindrical power battery system and automobile

Abstract

The utility model relates to a lightweight cylindrical power battery system and an automobile. The lightweight cylindrical power battery system comprises a box body, a first module and a second module, the first module and the second module are both arranged in the box body; the first module comprises a plurality of first battery modules which are arranged side by side and adopt cylindrical power battery monomers, and the plurality of first battery modules are arranged along a first direction of the horizontal direction; the second module comprises a plurality of second battery modules which are arranged side by side and adopt cylindrical power battery monomers, and the plurality of second battery modules are arranged along a second direction of the horizontal direction; the first direction is perpendicular to the second direction. According to the power battery system, the cylindrical power batteries which are small in size and light in weight are adopted, so that the internal structure of the power battery system is compact in arrangement and reasonable in layout, the internal space of the box body is fully utilized, the space utilization rate of the system is increased, and the energy density of the battery pack system and the endurance mileage of the vehicle are increased.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a lightweight cylindrical power battery system and a vehicle. Background Art

[0002] With the development of the new energy industry and the vigorous promotion of clean energy, the development from fuel vehicles to electric vehicles has become the mainstream development trend today. As the core component of electric vehicles, the energy density and range of power batteries have received widespread attention. With the development of power battery technology, battery packs often use increased component integration to increase battery energy density.

[0003] However, the power batteries currently on the market often use square battery modules. When the Z-direction space of the battery pack is limited, the space inside the box cannot be effectively utilized. In addition, this type of battery pack has the problems of large size and weight, resulting in low energy density of the battery system.

[0004] Therefore, there is an urgent need to provide a lightweight cylindrical power battery system and a vehicle to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on this, a lightweight cylindrical power battery system and a vehicle are provided, which can improve the energy density of the power battery system and the utilization rate of the space inside the box.

[0006] On the one hand, a lightweight cylindrical power battery system is provided, comprising a casing, a first module module and a second module module; the first module module and the second module module are both arranged inside the casing; the first module module comprises a plurality of first battery modules arranged side by side and using cylindrical power battery cells, and the plurality of first battery modules are arranged along a first horizontal direction; the second module module comprises a plurality of second battery modules arranged side by side and using cylindrical power battery cells, and the plurality of second battery modules are arranged along a second horizontal direction; the first direction and the second direction are arranged perpendicular to each other.

[0007] Optionally, the power battery system also includes: a copper busbar, an integrated machine, a fuse, a discharge connector, a fast charging connector and a low-voltage collection connector arranged in the box body; the copper busbar connects the integrated machine, the fuse and the discharge connector in series to form a loop; the fast charging connector electrically connects the integrated machine and the discharge connector; the integrated machine and the low-voltage collection connector are both electrically connected to the first module module, the second module module and the fuse.

[0008] Optionally, the number of the first module modules is two, and the two first module modules are respectively located on both sides of the all-in-one machine; the number of the second module module is one, and the second module module is arranged beside the first module module.

[0009] Optionally, the interior of the first battery module is also electrically connected to a first wrap-around heating film; the interior of the second battery module is also electrically connected to a second wrap-around heating film.

[0010] Optionally, the box body includes a lower box body and an upper box cover, and the first module module, the second module module, the all-in-one machine, the fuse, the discharge connector, the fast charging connector and the low-voltage connector are all arranged in the lower box body, wherein the all-in-one machine includes a BMS, a BDU and a shunt, and the combination of the three is integrated inside the all-in-one machine.

[0011] Optionally, a first module fixing beam, a second module fixing beam and a third module fixing beam are transversely provided in the lower box body, and two integrated machine fixing beams distributed between and perpendicular to the first module fixing beam and the second module fixing beam are longitudinally provided in the lower box body; the first module fixing beam, the second module fixing beam, the third module fixing beam and the integrated machine fixing beam divide the interior of the lower box body into three accommodating areas, which are respectively used to place two first module modules and one second module module.

[0012] Optionally, the first module module is fixed on the first module fixed beam and the second module fixed beam; the second module module is fixed on the second module fixed beam and the third module fixed beam; and the all-in-one machine is fixed on the all-in-one machine fixed beam.

[0013] Optionally, a sealing ring is further provided at the connection between the lower box body and the upper box cover.

[0014] Optionally, the lower box body is made of aluminum material; and the upper box cover is made of PCM material.

[0015] On the other hand, a car is also provided, comprising the lightweight cylindrical power battery system.

[0016] Beneficial effects:

[0017] In the above-mentioned lightweight cylindrical power battery system and automobile, cylindrical power battery cells are used in both the first battery module and the second battery module, and several first battery modules are arranged along a first horizontal direction, and several second battery modules are arranged along a second horizontal direction. In this way, the power battery system has the advantages of small size, light weight, flexible arrangement, etc., which can make full use of the envelope space within the power battery system and improve the integration of power battery system components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded schematic diagram of a lightweight cylindrical power battery system in one embodiment;

[0019] Figure 2 Schematic diagram of the structure of a box in one embodiment.

[0020] Figure numerals: 1. Box body; 11. Upper box cover; 12. Lower box body; 121. First module fixing beam; 122. Second module fixing beam; 123. Third module fixing beam; 124. All-in-one machine fixing beam; 13. Sealing ring; 2. First module module; 21. First battery module; 22. First wrap-around heating film; 3. Second module module; 31. Second battery module; 32. Second wrap-around heating film; 4. Copper busbar; 5. All-in-one machine; 6. Fuse; 7. Discharge connector; 8. Fast charging connector; 9. Low-voltage collection connector. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner, and therefore the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0024] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] The embodiments of the present application provide a lightweight cylindrical power battery system and a vehicle, which can improve the energy density of the power battery system and the utilization rate of the space inside the box.

[0026] The following is a detailed description of a lightweight cylindrical power battery system provided in this embodiment. Figure 1 As shown, it includes: a box body 1, a first module module 2 and a second module module 3, wherein the first module module 2 and the second module module 3 are both arranged inside the box body 1, wherein the first module module 2 includes a plurality of first battery modules 21 arranged side by side and using cylindrical power battery cells, and the plurality of first battery modules 21 are arranged along a first direction x in the horizontal direction; the second module module 3 includes a plurality of second battery modules 31 arranged side by side and using cylindrical power battery cells, and the plurality of second battery modules 31 are arranged along a second direction y in the horizontal direction, and the first direction and the second direction are arranged perpendicular to each other. Preferably, the first direction x may be along the width direction of the box body 1; and the second direction y may be along the length direction of the box body 1.

[0027] In this embodiment, both the first battery module 21 and the second battery module 31 use cylindrical power battery cells with small size, light weight and flexible arrangement, and several first battery modules 21 are arranged along a first horizontal direction x, and several second battery modules 31 are arranged along a second horizontal direction y. The arrangement method is flexible and the layout is reasonable, which makes full use of the internal space of the box body 1, improves the system space utilization rate, and improves the energy density of the battery pack system and the vehicle range.

[0028] In this embodiment, it should be noted that the power battery system also includes a copper busbar 4, an integrated machine 5, a fuse 6, a discharge connector 7, a fast charge connector 8 and a low voltage collection connector 9 arranged in the box 1; wherein the copper busbar 4 connects the discharge connector 7, the integrated machine 5 and the fuse 6 in series to form a loop; the fast charge connector 8 electrically connects the discharge connector 7 and the integrated machine 5; the integrated machine 5 and the low voltage collection connector 9 are both electrically connected to the first module module 2, the second module module 3 and the fuse 6, thereby realizing the discharge and fast charge functions of the power battery system and the collection and transmission of information such as voltage, current and temperature during the charging and discharging process. The power battery system in this embodiment uses a small, light and low-cost integrated machine 5 to replace BMS, BDU and shunt, which saves layout space to a great extent.

[0029] In this embodiment, it should also be noted that the first module 2 is provided in two pieces, and the two first module modules 2 are respectively located on both sides of the integrated machine 5. It can be understood that the two first module modules 2 and the integrated machine 5 are arranged side by side along the width direction of the box 1. The second module 3 is provided in one piece, and one second module module 3 is arranged beside the first module module 2. It can be understood that the second module module 3 and the first module module 2 are arranged side by side along the length direction of the box 1. Such a setting makes the internal structure of the power battery system arranged compactly and reasonably, and makes full use of the internal space of the box 1.

[0030] In some embodiments, each first module 2 is composed of three first battery modules 21 arranged side by side, and the model of the three first battery modules 21 can be a 6P9S battery module. Of course, the number of first battery modules 21 in the first module 2 is not limited in this embodiment, and other numbers of first battery modules 21 can be arranged side by side in other embodiments. The second module 3 is composed of three second battery modules 31 arranged side by side, and the model of the three second battery modules 31 can be a 6P18S battery module. Of course, the number of second battery modules 31 in the second module 3 is not limited in this embodiment, and other numbers of second battery modules 31 can be arranged side by side in other embodiments.

[0031] In the present embodiment, it should also be noted that the interior of the first battery module 21 is also electrically connected to the first wrapped heating film 22, and the interior of the second battery module 31 is also electrically connected to the second wrapped heating film 32. The first wrapped heating film 22 and the second wrapped heating film 32 are both calculated through thermal simulation and adopt a wound effective heating area, that is, a heating wire is arranged in the middle 1 / 2 of the cylindrical battery cell, and the rest of the position is thermal conductive silicone, which is connected to the high-voltage line through the heating wire. The battery cell is heated at a low temperature to ensure the charging and discharging performance of the battery cell, effectively reducing the battery cost and weight.

[0032] Please refer to Figure 1 , Figure 2 As shown, in this embodiment, it should be noted that the box body 1 adopts a combined installation method of aluminum profile extrusion molding and split welding, including a lower box body 12 and an upper box cover 11, and the first module module 2, the second module module 3, the integrated machine 5, the fuse 6, the discharge connector 7, the fast charging connector 8 and the low-voltage connector 9 are all arranged in the lower box body 12, wherein the interior of the integrated machine 5 is composed of a BMS (Battery Management System), a BDU (Battery Distribution Unit) and a shunt, which greatly reduces the volume, reduces the weight and reduces the space occupancy.

[0033] In some embodiments, a first module fixed beam 121, a second module fixed beam 122 and a third module fixed beam 123 are transversely disposed inside the lower box body 12, and the first module fixed beam 121, the second module fixed beam 122 and the third module fixed beam 123 are arranged at equal intervals along the length direction of the lower box body 12; two integrated machine fixed beams 124 are longitudinally disposed inside the lower box body 12, and the two integrated machine fixed beams 124 are distributed between the first module fixed beam 121 and the second module fixed beam 122, and the integrated machine fixed beam 124 is perpendicular to the first module fixed beam 121 and the second module fixed beam 122.

[0034] The first module fixed beam 121, the second module fixed beam 122, the third module fixed beam 123 and the integrated machine fixed beam 124 divide the interior of the lower box 12 into three accommodating areas, which are respectively used to place two first module modules 2 and one second module module 3. It can be understood that the two first module modules 2 are fixed on the first module fixed beam 121 and the second module fixed beam 122, the second module module 3 is fixed on the second module fixed beam 122 and the third module fixed beam 123, and the integrated machine 5 is fixed on the integrated machine fixed beam 124. Such a configuration makes the internal structure of the power battery system arranged compactly and reasonably, makes full use of the internal space of the box 1, and improves the space utilization rate of the box 1.

[0035] In some embodiments, a sealing ring 13 is further provided at the connection between the lower box body 12 and the upper box cover 11 . The use of the sealing ring 13 can increase the sealing performance between the upper box cover 11 and the lower box body 12 .

[0036] Furthermore, the lower box body 12 is made of aluminum; the upper box cover 11 is made of PCM material. The PCM material has a fireproof function, which greatly improves the safety of the box body 1. The box body 1 uses an aluminum lower box body 12 and a PCM upper box cover 11. While achieving lightweight, it also increases the service life of the power battery system and reduces costs.

[0037] An embodiment of the present application also provides a car, comprising the above-mentioned lightweight cylindrical power battery system.

[0038] The assembly process of the utility model is as follows: first, the first wrapping heating film 22 is assembled inside the first battery module 21, and the second wrapping heating film 32 is assembled inside the second battery module 31. Then, six first battery modules 21 are arranged side by side in groups of three to form two first module modules 2, and three second battery modules 31 are arranged side by side to form a second module module 3. Then, the two first module modules 2 are fixed on the first module fixing beam 121 and the second module fixing beam 122 respectively, and the second module module 3 is fixed on the second module fixing beam 122 and the third module fixing beam 123. Then, Fix the integrated device 5 on the integrated device fixing beam 124, fix the fuse 6 on the lower box body 12, and connect the discharge connector 7, the integrated device 5, and the fuse 6 in series through the copper bus 4 to form a loop, and electrically connect the fast charging connector 8 to the discharge connector 7, and electrically connect the integrated device 5 and the low-voltage collection connector 9 to the first module module 2, the second module module 3 and the fuse 6, so as to realize the discharge and fast charging functions of the power battery system and the collection and transmission of information such as voltage, current, and temperature during the charging and discharging process, and then stick the sealing ring 13 on the lower box body 12, and finally close the upper box cover 11 to complete the installation of the power battery system.

[0039] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A lightweight cylindrical power battery system, characterized in that: include: A box body (1), a first module group (2) and a second module group (3); The first module group (2) and the second module group (3) are both arranged inside the box (1); The first module (2) comprises a plurality of first battery modules (21) arranged side by side and using cylindrical power battery cells, wherein the plurality of first battery modules (21) are arranged along a first direction in a horizontal direction; The second module (3) comprises a plurality of second battery modules (31) arranged side by side and using cylindrical power battery cells, wherein the plurality of second battery modules (31) are arranged along a second direction in the horizontal direction; The first direction and the second direction are arranged perpendicular to each other; The power battery system further comprises: a copper busbar (4) arranged in the box (1), an integrated device (5), a fuse (6), a discharge connector (7), a fast charge connector (8) and a low-voltage collection connector (9); The copper busbar (4) connects the integrated device (5), the fuse (6) and the discharge connector (7) in series to form a loop; The fast-charging connector (8) is electrically connected to the integrated device (5) and the discharge connector (7); The integrated machine (5) and the low-voltage collection connector (9) are both electrically connected to the first module group (2), the second module group (3) and the fuse (6).

2. The lightweight cylindrical power battery system according to claim 1, characterized in that: The first module (2) is provided in two pieces, and the two first module (2) are respectively located on two sides of the all-in-one machine (5); The second module group (3) is provided as one, and one second module group (3) is provided beside the first module group (2).

3. The lightweight cylindrical power battery system according to any one of claims 1 to 2, characterized in that: The first battery module (21) is also electrically connected to a first wrap-around heating film (22) inside; and the second battery module (31) is also electrically connected to a second wrap-around heating film (32) inside.

4. The lightweight cylindrical power battery system according to claim 1, characterized in that: The box body (1) comprises a lower box body (12) and an upper box cover (11); the first module (2), the second module (3), the integrated machine (5), the fuse (6), the discharge connector (7), the fast charge connector (8) and the low voltage collection connector (9) are all arranged in the lower box body (12); the integrated machine (5) comprises a BMS, a BDU and a shunt, and the three are integrated in the integrated machine (5).

5. The lightweight cylindrical power battery system according to claim 4, characterized in that: A first module fixed beam (121), a second module fixed beam (122) and a third module fixed beam (123) are transversely arranged in the lower box body (12), and two integrated machine fixed beams (124) are longitudinally arranged in the lower box body (12) and are distributed between the first module fixed beam (121) and the second module fixed beam (122) and are perpendicular to the first module fixed beam (121) and the second module fixed beam (122); The first module fixing beam (121), the second module fixing beam (122), the third module fixing beam (123) and the integrated machine fixing beam (124) divide the interior of the lower box (12) into three accommodating areas, which are respectively used to place two of the first module modules (2) and one of the second module modules (3).

6. The lightweight cylindrical power battery system according to claim 5, characterized in that: The first module group (2) is fixed on the first module group fixed beam (121) and the second module group fixed beam (122); the second module group (3) is fixed on the second module group fixed beam (122) and the third module group fixed beam (123); and the all-in-one machine (5) is fixed on the all-in-one machine fixed beam (124).

7. The lightweight cylindrical power battery system according to claim 4, characterized in that: A sealing ring (13) is also provided at the connection between the lower box body (12) and the upper box cover (11).

8. The lightweight cylindrical power battery system according to claim 4, characterized in that: The lower box body (12) is made of aluminum material; the upper box cover (11) is made of PCM material.

9. A car, characterized in that: A lightweight cylindrical power battery system comprising the following:

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